Little details get left out. Be sure to change the Subject line in the first post to read [solved] Along side the original "Libre Office - Spell Check not working" so other users may benefit from your experience.

Before using apt-get ect Which I was going to do, try the most obvious way first!

1< Open/Start LibreOffice Writer2> Type some words in the blank page, some correct and other words with spelling mistakes.3> If there is NO squiggly lines under the mistakes then move on to point # >4. If the typos are marked as errors then the spell application works.4> Select [Tools] from the Menu.5> From the Tools menu select [Language].6> With the Language option highlighted, choose the top option on the right [For Selection].7> After highlighting For Selection, choose from the choices on the right side - [English (Canada)] or English (USA). If this not your preferred language then select MORE.8> Now we once again need to select Tools from the Menu, followed by Language then this time select [For Paragraph].9> After highlighting For Paragraph, you are again faced with the same options on the right as noted in point #7. [Choose English (Canada)] or English (USA). If this not your preferred language then select MORE.10> For the third and final time from the Tools menu select [Language].11> With Language highlighted select [For all Text].12> After highlighting For all Text, you are again faced with the same options on the right as noted in point #7. [Choose English (Canada)] or English (USA). If this not your preferred language then select MORE.13> If you have chosen either [Choose English (Canada)] or English (USA), you should now see the spelling errors on your page._____________________________________________________________________________________________________________________________________________________________________________________

...or you can cut out a few steps from point 3 onwards by using CTRL-A to select all the text, then looking at the language shown as the middle (fourth from left) entry on the bottom of the window. [Note that CTRL-A sometimes behaves strangely and does not select all of the text within some tables and Frames]If it is showing your language... then you don't have to reset it. If it is showing the wrong language, you can right-click on the language shown (or on Multiple Languages if your selection had ... multiple languages) and select the language you want.

To check if the language that is set for your default documents is capable of spell-checking, use Tools-Options-Language Settings-Languages and see if there is a little tick with (ABC) beside the chosen language. For example, I live in Ireland but use English(UK) as it has the spell-checker, while English(Ireland) does not.